Directions : Each of the following items features one part of a sentence followed by four alternatives. Complete the sentence by choosing the correct alternative. 

Since you have been touring all day 

The correct answer is '1' i.e. you must be tired .

Key Points

• The sentence requires a logical conclusion based on the condition stated.
• Option 1 "you must be tired" correctly infers the likely consequence of touring all day.
• Options 2, 3, and 4 are either grammatically incorrect or do not logically follow from the given condition.

Correct sentence: Since you have been touring all day, you must be tired.

Additional Information

• Modal Verbs of Probability:
  • Must: Used to express a strong probability based on evidence (e.g., You must be tired).
  • Might: Used to express a weaker possibility (e.g., You might be tired).
  • Ought to: Typically used to express advisability or expectation, not probability (e.g., You ought to rest).